利用js實現遮罩以及彈出可移動登錄窗口
編輯：JavaScript綜合知識
本篇文章是對使用js實現遮罩以及彈出可移動登錄窗口的實現方法進行了詳細的分析介紹，需要的朋友參考下
復制代碼 代碼如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">
function showLogin() {
var loginDiv = document.getElementById("loginDiv");
var zhezhao = document.getElementById("zhezhao");
var clientx = document.documentElement.clientWidth;
var clienty = document.documentElement.clientHeight;
var l_margin = (clientx - parseInt(loginDiv.style.width)) / 2;
var t_margin = (clienty - parseInt(loginDiv.style.height)-200) / 2
loginDiv.style.left = l_margin + "px";
loginDiv.style.top = t_margin +"px";
loginDiv.style.display = "block";
zhezhao.style.display = "block";
}
function hidLogin() {
var loginDiv = document.getElementById("loginDiv");
var zhezhao = document.getElementById("zhezhao");
loginDiv.style.display = "none";
zhezhao.style.display = "none";
}
function titleMove() {
var moveable = true;
var loginDiv = document.getElementById("loginDiv");
//以下變量提前設置好 var clientX = window.event.clientX;
var clientY = window.event.clientY;
var moveTop = parseInt(loginDiv.style.top);
var moveLeft = parseInt(loginDiv.style.left);
document.onmousemove = function MouseMove() {
if (moveable) {
var y = moveTop + window.event.clientY - clientY;
var x = moveLeft + window.event.clientX - clientX;
if (x > 0 && y > 0) {
loginDiv.style.top = y + "px";
loginDiv.style.left = x + "px";
}
}
}
document.onmouseup = function Mouseup() {
moveable = false;
}
}
</script>
</head>
<body>
<!--Main start z-index:0-->
<div id="Main" style="position:absolute;z-index:0;">
<a href="javascript:showLogin()">登陸</a>
</div>
<!--Main start z-index:0-->
<!--loginDiv start :z-index:2-->
<div id="loginDiv" style="background-color:white;width:300px;height:150px;border:1px solid blue;z-index:2;display:none;position:absolute;border-top:none">
<div onmousedown="titleMove()" id="login_title" style="width:300px;height:25px;background-color:Blue;border:1px solid silver;border-left:none;border-right:none">
<!--<img src="../images/close.jpg" style="float:right" onclick="hidLogin()"/>-->
<a href="javascript:hidLogin()" style="float:right;text-decoration:none;color:white;margin-right:2px;font-size:20px">×</a>
</div>
<table style="clear:right;width:298px;height:115px;text-align:right;margin-top:10px;">
<tr><td>用戶名：</td><td><input type="text" style="width:180px;" /></td><td> </td></tr>
<tr><td>密碼:</td><td><input type="text" style="width:180px;" /></td><td> </td></tr>
<tr><td><br /></td><td></td></tr>
</table>
</div>
<!--loginDiv end :z-index:2-->
<!--zhezhao start: z-index:1-->
<div id="zhezhao" style="position:absolute;z-index:1;width:100%;height:100%;background-color:silver;display:none;opacity:.5;">
<!--zhezhao end-->
</div>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">
function showLogin() {
var loginDiv = document.getElementById("loginDiv");
var zhezhao = document.getElementById("zhezhao");
var clientx = document.documentElement.clientWidth;
var clienty = document.documentElement.clientHeight;
var l_margin = (clientx - parseInt(loginDiv.style.width)) / 2;
var t_margin = (clienty - parseInt(loginDiv.style.height)-200) / 2
loginDiv.style.left = l_margin + "px";
loginDiv.style.top = t_margin +"px";
loginDiv.style.display = "block";
zhezhao.style.display = "block";
}
function hidLogin() {
var loginDiv = document.getElementById("loginDiv");
var zhezhao = document.getElementById("zhezhao");
loginDiv.style.display = "none";
zhezhao.style.display = "none";
}
function titleMove() {
var moveable = true;
var loginDiv = document.getElementById("loginDiv");
//以下變量提前設置好 var clientX = window.event.clientX;
var clientY = window.event.clientY;
var moveTop = parseInt(loginDiv.style.top);
var moveLeft = parseInt(loginDiv.style.left);
document.onmousemove = function MouseMove() {
if (moveable) {
var y = moveTop + window.event.clientY - clientY;
var x = moveLeft + window.event.clientX - clientX;
if (x > 0 && y > 0) {
loginDiv.style.top = y + "px";
loginDiv.style.left = x + "px";
}
}
}
document.onmouseup = function Mouseup() {
moveable = false;
}
}
</script>
</head>
<body>
<!--Main start z-index:0-->
<div id="Main" style="position:absolute;z-index:0;">
<a href="javascript:showLogin()">登陸</a>
</div>
<!--Main start z-index:0-->
<!--loginDiv start :z-index:2-->
<div id="loginDiv" style="background-color:white;width:300px;height:150px;border:1px solid blue;z-index:2;display:none;position:absolute;border-top:none">
<div onmousedown="titleMove()" id="login_title" style="width:300px;height:25px;background-color:Blue;border:1px solid silver;border-left:none;border-right:none">
<!--<img src="../images/close.jpg" style="float:right" onclick="hidLogin()"/>-->
<a href="javascript:hidLogin()" style="float:right;text-decoration:none;color:white;margin-right:2px;font-size:20px">×</a>
</div>
<table style="clear:right;width:298px;height:115px;text-align:right;margin-top:10px;">
<tr><td>用戶名：</td><td><input type="text" style="width:180px;" /></td><td> </td></tr>
<tr><td>密碼:</td><td><input type="text" style="width:180px;" /></td><td> </td></tr>
<tr><td><br /></td><td></td></tr>
</table>
</div>
<!--loginDiv end :z-index:2-->
<!--zhezhao start: z-index:1-->
<div id="zhezhao" style="position:absolute;z-index:1;width:100%;height:100%;background-color:silver;display:none;opacity:.5;">
<!--zhezhao end-->
</div>
</body>
</html>
【效果】
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